/*
 * Copyright 2017 StreamSets Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.streamsets.datacollector.creation;

import com.streamsets.pipeline.api.Config;
import com.streamsets.pipeline.api.StageException;
import com.streamsets.pipeline.api.StageUpgrader;
import com.streamsets.pipeline.api.impl.Utils;

import java.util.Collections;
import java.util.List;

public class RuleDefinitionsConfigUpgrader implements StageUpgrader {

  @Override
  public List<Config> upgrade(List<Config> configs, Context context) throws StageException {
    switch(context.getFromVersion()) {
      case 0:
        upgradeV0ToV1(configs);
        // fall through
      case 1:
        upgradeV1ToV2(configs);
        break;
      default:
        throw new IllegalStateException(Utils.format("Unexpected fromVersion {}", context.getFromVersion()));
    }
    return configs;
  }

  private void upgradeV0ToV1(List<Config> configs) {
    boolean found = false;
    for (Config config : configs) {
      if (config.getName().equals("webhookConfigs")) {
        found = true;
      }
    }

    if(!found) {
      configs.add(new Config("webhookConfigs", Collections.emptyList()));
    }
  }

  private void upgradeV1ToV2(List<Config> configs) {
    boolean found = false;
    for (Config config : configs) {
      if (config.getName().equals("emailIDs")) {
        found = true;
      }
    }

    if(!found) {
      configs.add(new Config("emailIDs", Collections.emptyList()));
    }
  }

}
